Prompt: What if Hizashi cheats on Shouta?
This does have a good and bad ending.

Warnings: Panic Attack

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Nemuri: Izuku, I need you in Hizashi's room NOW.

Why would she text me so early in the morning?

When I received that message, I was expecting a prank.

However, when I hear screaming through the open door, I realize how serious this is. I rush in to see Hizashi and Nemuri looking ruffled on one side of the room, and Shouta pissed on the other. I stay back for now.

Wait, didn't those two plus Tensei go drinking last night? Shouta had patrol, and I can't really go.

They didn't...right?

Shouta yells with something I never heard from him before, "I WAITED 15 YEARS FOR YOU, AND I'M WILLING TO ACCEPT ANYTHING THAT HAPPENED BEFORE OUR RELATIONSHIP! DURING?! NO! AND TO DO IT WITH OUR BEST FRIEND?! WHAT ARE YOU TWO TRYING TO PULL?! ARE YOU TRYING TO BREAK US APART?!"

Hizashi raises his hands in tears, "We didn't plan this! We don't even remember what happened! Shouta, please, it was a mistake!"

"YOU MADE THAT CHOICE TO DRINK AND FUCK, DIDN'T YOU?!"

"Y-yes, but Sho-"

"I DON'T WANT TO HEAR ANY EXCUSES! AND YOU-!" Shouta faces Nemuri, "WHAT WERE YOU THINKING WHEN YOU DECIDED TO GET SCREWED UP IN THE HEAD?! THIS IS WHY DIDN'T WANT YOU TWO GOING OUT BECAUSE I WAS AFRAID ONE OF YOU WAS GOING TO MAKE A STUPID MISTAKE! I DIDN'T WANT EITHER OF YOU INJURED, AND YOU DO THIS TO ME?!"

Nemuri growls, "I'll take responsibility for what happened, but you need to calm down-"

"HOW CAN YOU EXPECT ME TO CALM DOWN WHEN THE TWO OF YOU HAD SEX?! DO YOU REALIZE HOW BADLY THIS CHANGES OUT FRIENDSHIP!?" I notice Shouta trembling, but I continue to stay back because I believe he would try to get rid of me right now. Hizashi tries to approach to comfort, but Shouta growls, "DON'T COME NEAR ME!"

"Shouta, please," Hizashi begs.

Then, what Nemuri says next pisses me off, "Shouta, shit happens. Forgive and forget."

If it was a minor situation, I would understand. However, this is huge, and this bothers Shouta. In general, they shouldn't be trying anything because he's way too emotional right now.

Speaking of Shouta, I have never seen him like this, but it makes sense. Imagine liking someone for 15, and you just start dating them only for them to cheat on you. I can't relate because I probably would be the hoe, but I at least know that it's a damaging position to be in.

Before somebody can get another word in, I interrupt, "You really think this is a forgive and forget situation?"

Everyone snaps their attention towards me.

The first to react is Shouta with...like he is holding back, "What are you doing here, Izuku?"

I look over him carefully and realize that he isn't in good shape mentally. I need to stay calm for him, " Nemuri called me down, but I-"

Shouta snaps, interrupting me, "Why did you ask him to come? He doesn't need to be involved! He goes through enough shit as is! He doesn't need this on top of it!" I raise my hand to stop her from responding.

"I would have found out anyway. Nemuri, Hizashi, you have no right to manipulate him in this state of mind to bend to your whims. He needs to calm down and make the decision himself of whether he wants to stay with Hizashi or not. I don't want to see either of you around him for the rest of the day today. Understood?"

Both of them nod with a disappointed expression.

"Come on, Sho," I say as I go to leave the room. When I see him not moving, I sigh, grab his wrist, and guide him out gently. I can feel his pulse pounding from the light grip as I lead him to my room because I don't trust him on his own at the moment.

I make him sit down on the edge of the bed, "Shouta?" No response.

Fuck. I quickly look over Shouta.

His eyes are glazed over.

He's not reacting.

His breathing rate is increasing.

Wait...Shouta is having an attack. Fuck, why did it take me so long to realize it?!

With as much care as I can muster, I grab his hands, press them against my chest, and slow down my breathing, hoping my heart rate doesn't affect things too much, "Shouta, it's Izuku. You're in my room. I need you to match my breathing."

After a couple of minutes with no change, I get desperate for him to calm down; I remove my hands from his, step forward to where our knees are touching, wrap one arm around his shoulders, and press him against my chest. With my free hand, I run it through his hair, "You really do break limits, huh, Sho?"

I start muttering random things while keeping myself under control, specifically details of the room.

You know that thing where you're so hyperactive focus that you don't even notice what you need to? Yeah, that happened. I was making sure I don't panic on him that I didn't realize he snapped out of it until he pulls me as close to him as possible.

"Fuck, a warning next time won't you?" I can't really help myself. Who knows? Maybe something normal will help.

I hear Shouta sigh as he loosens his grip, "Sorry, kid. You didn't need to see any of that, especially with all the shit you got through." Without a word, I pull him close.

"You're fine. You can come to me for this shit. I may not understand it, but I can do...this at least."

Shouta remains quiet for a moment before speaking again, "What should I do?"

"You're asking the dumbest emotionally person ever. However, if you want something logical, rest on it. I'm not going to tell you what to choose because that's unfair on you. Just do what you feel is right in your opinion."

"...I have to teach today, huh?"

"I can teach for you if you want to hide in here." Shouta sighs once more as he keeps his head to my chest.

He contemplates for a moment, "Can someone take over my class?"

"Me? Yes."

"I mean someone else."

"Damn, the lack of trust."

Shouta nearly growls, "I want you here, Izuku." Wait, what?

"Why?"

"I don't want them aggravating you." I don't think they would, but I guess it's a valid reason.

"You want paperwork to grade?" Shouta nods, "Alright, give me ten minutes, Sho."

I head out to grab the paperwork.

And for the whole day, I take care of him even if it requires a lot of physical contact.

The shit I do for the dumbass.

---

Next Morning

"Izuku, I have my answer." Shouta starts with the next morning while I am making breakfast.

"Gotcha," I mutter as I make sure not to burn anything.

"I want you to come with me. It changes the behavior of the entire squad, and it's unfair to leave you out of it."

"Okay."

"I'm surprised you aren't reacting more."

"Unless you want your eggs burnt." I hear him huff somewhere behind me.

The next thing I know, the squad is outside sitting at a table with Shouta and I at one side and Nemuri and Hizashi on the other.

---

Good Ending

Shouta sighs as he leans against the table, "I decided to accept you back, " Hizashi looks like he is about to get up, but I glare him down to keep him in his seat so Shouta can continue, "But I don't trust you completely. I need time. You need to earn my trust back after this bullshit. Don't ruin this chance, Zashi, Nemuri."

Meanwhile, Hizashi looks like he is about to cry and Nemuri has a smile.

Hizashi screams, "THANK YOU, THANK YOU, THANK YOU! I WON'T LET YOU DOWN, SHO!"

Shouta cuts him off, "I have one request: No more drinking. I dealt with it enough with Izuku, and I don't want to see any of ya'll going down because of it."

"Until I'm 21," I add. That causes Shouta to use his quick on me.

"Never."

"Fuck."

"I can agree with it," Hizashi says. Nemuri nods in agreement as well.

THE SQUAD IS BACK IN ACTION!

---

Bad Ending

"Hizashi, I can't do this. I will forever see you as a friend, but I don't think I can recover to see you as a lover again." Shouta states with a blank look on his face.

That immediately sparks outcry.

Hizashi stands up, "Please, Sho! I need you! I won't give up on you-"

When I feel Shouta withdrawing, I snap, "That's his decision, and you will respect it. You're lucky to still be friends." As gently as I could, I grab Shouta and get him out of the situation.

I watch the two try to follow us, but I throw a knife to keep them off.

I can't have them messing with Shouta more.